Why Do Cats Vibrate Their Tail? This Is What They Might Be Signalling With It We Love Catz What is she trying to tell me? Vibrating tail??? : r CATHELP Cat Tail Language: What Your Cat's Tail Really Means Ask A Vet: Why Does My Cat Twitch His Tail? Understanding Your Cat's Vibrating Tail Behavior TikTok You asked and we picked one question to answer this week: "Why does my cat shake her tail like a rattlesnake?", We've got the answer below from behavior professional Kenzie Korpela, IAABC SBA, CFVA.